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Table 1 Physical characteristics for all subjects

From: Influence of maturation on anthropometry and body composition in Japanese junior high school students

  Boys (n = 245) Girls (n = 207)
  12.0 to 12.99 years 13.0 to 13.99 years 14.0 to 14.99 years 12.0 to 12.99 years 13.0 to 13.99 years 14.0 to 14.99 years
  (n = 32) (n = 129) (n = 84) (n = 24) (n = 117) (n = 66)
Age (years) 12.6 ± 2.2 13.4 ± 0.3 14.4 ± 0.3 12.7 ± 0.2 13.4 ± 0.3 14.4 ± 0.2
Height (cm) 152.5 ± 6.3 157.8 ± 9.4 165 ± 6.3 152.7 ± 7.4 154.5 ± 5.2 155.5 ± 4.8
Weight (kg) 42.0 ± 6.1 48.2 ± 9.4 54.5 ± 7.7 45.0 ± 8.0 45.4 ± 5.7 48.1 ± 5.3
BMI (kg/m2) 18.0 ± 1.9 19.2 ± 2.6 19.9 ± 2.0 19.2 ± 2.5 19.0 ± 2.0 21.0 ± 3.4
% Fat (%) 14.8 ± 5.8 16.7 ± 7.9 16.7 ± 5.4 24.8 ± 6.8 24.4 ± 5.5 30.1 ± 6.3
LBM (kg) 35.5 ± 3.8 39.7 ± 5.4 45.1 ± 4.4 33.5 ± 4.3 34.1 ± 3.1 34.8 ± 4.5
Number of subjects in each stage of PH
PH1 7 11 0 0 6 0
PH2 13 35 5 5 6 0
PH3 3 19 8 3 24 11
PH4 3 24 28 11 42 26
PH5 1 25 20 2 18 16
No answer 5 15 23 3 21 13
PH 2.2 ± 1.1 3.1 ± 1.3 4.0 ± 0.9 3.5 ± 1.1 3.6 ± 1.1 4.1 ± 0.7
  1. Values are expressed as mean ± SD. Age, chronological age; BMI, body mass index;% Fat, percent body fat; LBM, lean body mass; PH, stage of pubic hair development.